Ink-eradicator.



. UNITED STATES PATENT ()FFICE.

HUGO MOCK, OF. ST. PAUL, MINNESOTA, ASSIGNOR, BY-MESNE ASSIGN- MENTS, TOWILLIAM A. ALBRECHT AND ARTHUR O. DAVENPORT,

, on ST. PAUL, MINNESOTA.

INK-EIRADICATIQR.

SPEGIFIQATION formingpart of Letters Patent No. 716,567, dated December23, 1902. Application filed November 1,1900. Renewed September 26, 1902.Serial lie-125,009. (No specimens.)

To all whom it may concern.-

Be it known that I, HUGO Moon, of St.

Paul, Ramsey county, State of Minnesota,

have invented certain new and useful Improvements in Ink-Eradicators, ofwhich the following is a specification.

The object of the invention is to provide an ink-eradicator preferablyin the form of a paste that can be conveniently and quickly applied tothe hands of persons accustomed to use ink and who are thus liable toget ink upon their hands.

Another object of the invention is to provide an ink-eradicat'or thatcan be used convenientlyand quickly forremovingink-marks from paper andother substances without injury to such substance.

The-invention consists generally in a new composition of materialhereinafterdescribed, and particularly pointed out in the claims.

In carrying out my invention I take chlorid of lime, sodium carbonate,and magnesium carbonate. I first mix chlorid of lime withwaterin'theproportion of three parts of chlorid of lime to fifteen partsof water. As the chlorid of lime is not completely soluble in water,there will be a residue, which is then filtered ofi, or the solution isremoved by decantation or other suitable process. With this solution ismixed one and one-half parts of sodium carbonate, which precipitates allthe calcium in the solution as calcium carbonate, leaving sodiumhypochloriteand sodium chlorid in the solution. The precipitate andsolution are together then mixed with'about four parts of magnesiumcarbonate to form a paste of the desired consistency. formed will keepindefinitely, largely owing to the presence of the magnesium carbonate,

and the compound thus formed constitutes an effective ink-eradicatorconsisting only of a single article, easily applied, and which is muchmore convenient for use than any other known ink-eradicator.

The separation of the sodiuin'chlorid. from The paste th us.

the sodium hypochlorite is based on the difsodium chlorid separates outfirst and the sodium hypochlorite remains in solution. Owing to the factthat boiling thesolution would decompose the sodium hypochlorite theconcentration and subsequent crystallization of the sodium chlorid musttake place in one of two ways-either by spontaneous evaporation in theopen air-or by evaporation in a low temperature under reduced pressure.The latter I consider the preferable method. The presence of themagnesium carbonate in the ink-eradicator tends to prevent thedecomposition of the sodium hypochlorite.

This ink-eradicator is designed mainly for useupon the hands for thepurpose of removing ink-stains therefrom. It may, however, be used for'removing ink-marks from paper or other substances; As the paste is notabsorbed by the paper, there is no injury to the paper from its use, anda very eflfect-- ter', in the proportions substantially as hereinbeforespecified.

2. An ink-eradicator, consisting of sodium hypochlorite,-.sodinmchlorid, calcium carbonat'e, magnesium carbonate, and water, insubstantially the proportions hereinbefore specified, I e I In' witnesswhereof I have hereunto set my hand this 29th day of October, 1900.

HUGO MocK.

In presence of- A. C. RAUL, RICHARD'PAUL'

